There is no average income in Forex - not in absolute amounts, nor in percentage return. It is a high-risk probabilistic activity with a non-normal distribution of income. Some earn 1% per year, others earn 200% per year, but many more are losing.
Depends on your risk tolerance (are you ready to lose it?), your profitability and your understanding of "decent living". I wouldn't even try with anything below $1 million.
Yes, the same as between two random traders inside those two groups.
I strongly advise you not to do it. Except if you can get yourself hired to some Forex trading company and be able trade there with investors' money.[/QUOTE
Also, perhaps check out
www.daytradetoronto.com. We work with several firms that provide trade capital for forex, stock, futures trading. Trading is something that takes time and patience and education. Definitely don't trying doing it full time right away.